Robert creuzbaur



'nosn'r CREUZBA'UR, 0F sRooKLYs, NEW YORK.

Mpmrlvesssrnaaua umn 30,1s69.

mmsrenamemmmmmnmmmpmaeu Be it known that 1,"Ronsn Cnnnznsun, of thev city of Brooklyn, Kings county, State of New York, have' invented an ImprovedValve; and I do hereby declare that thefollowin'g is a full and exact description thereof, reference being had tothe accompanying drawings, and to the letters of reference marked thereon.

The nature of my improvement consists in the construction cfa valve of a hollow cylindrical casing, with one or more ilexible rolls stretched around i between xetaining-anges, which rolls form the ing and closing-joints of the valve, whereby to produce a half anced valv free of l free'of concussion in its operation, c eap of construction, durable, and the efficacy of which is not ad'ecfed by impurities held suspended in the flnid'in which ,it operates.

Its application is principally to meters,l wherein one -such valve, with two rolls, controls four ports.

It is also applicable in some classes of engines, such as water-pressure engines, low-pressure', air, and other engines, and pumps.

In some cases,where the dl'erenoe of pressure on the' two sides of the prston'is considerable, a valve, with one ring, or roll, is used to smh port. Where that dif ference is not considerable, one valve, with two. 1011s, controls four ports.

To enable others skilled ln the art to make and use my invention, I will proceedto describe its mostruotion and operation, reference boing had to the annexed drawings, making a part of this speciication, in which- Figrnel isa longitudinal elevationin section, through the centre of the valve; and f Figure E is s front view, part of the covers supposed to be removed.

The illustration selected is its application to afinidmeter, in which the parts which operate the valve are at one end, within the working-cylinder and valve-oas ing, surrounded by the fluid bein measured.

A A represent part of a oy er, wherein a piston, A reciprocates.

and C are ,the two po connecting the valve with the two ends of the cylin er.

D and E are the feed and escape-ports, assuming E to be the feed-port.

F is the cylindrical valve-casing. G is the body oi the vadve, being a cylinder, open tt bothends, with two end flanges, g, and two middle sew' h h'nre two elastic ring-like rolls, a little larger in thickness than the space lett between the valve-casing F and the body of the valve G;

M is the valvestem, hinged to it at m', and connected at the other end, in this rase, to a rocking beam, N, which gives it'motlon. l

It is evident that this stem may be rigid, as well as hinged, and may pass out through a stulling-box, and receivennotion in any of the usual ways.

The operation of the valve is as follows:

In the position shown, the ilnid. enters at E, and passes through port C to the i'ront of the piston, which it forces to the rear; and the duid in the rear of the piston passes through port B, around the valve-lbody G, and out through escape-port D.

When the piston has reached its exh'emerear tion, the valve is shifted, by anyofthe usual ways, into the dotted position.

Now, the nld entering through E, around the outside of the valve-body G, and through port B, to therear of the piston, which it forces forward; -and the duid in front ofthe piston is forced out through port O, and through the centre of the valve, 'and passes' oxt ithrough escape-port D. This'cornplel'cs one revo ut on. v

It will be noticed that the valve-casing .travels twice the distance ofthe rolls, and must have 'a throw se cordingly. A

This throw need not be accurate, as it is only regnisite that the roll h', in the forward motion, stop at any point between the ports D and B, and the 'roll h, in

the hachI motion, at any point between the ports B and E.

As the rolls have aset, tending to 4roll them into the position of rest, the beginning and the end of the Strokeshould be that position of rest, and, therefore, the stroke of the valve just twice the circnmferewe of the roll; the latter to roll over once, so that the roll 'will tend to hold the valve'at either end of the stroke. I

For non-comprensible fluid, such as water, .the llow i of which must not be checked during the throw, the

rolls are made thin, and the ports wide, so that the latter can only be partially closed during thetr'avel of the roll over them. y 1.

The rolls work best when the port-opening is divided on opposite sides, 'and with ribs j', of the easing, left standing, as shown, to serveas a support for the roll to roll over.

[When only one roll'is used, which controls only one port,- the rolimnst close the port by stopping fight over it, for which purpose it must have a seat to check itin that position. 0

` In elastic fluids, the port is extended entirely around thecasing F, and l's made very nar-row, while the roll is made very thick, so that the port can be entirely closed by the roll; because, in the change of ports, the escape and feed-ports must be entirely and simultaneously covemd, to prevent the feed-gas from passing ont directly through theescape-port, without passing through the meter, or engine.

This arrangement is applicable to nou-compressible This improvement is applicable to all kinds of pistonvalves. A

What I claim, is-

1. One or more elastic rolls, arranged in relation to the ports of a piston-valve, substantially in the mannerdescribed.

2. The arrangement, consisting ofthe cylindrical open valve-casio G, rolls h h', flanges g, ports B 0 D E, and stem hg, substantially as described.-

BOBT. OBEUZBAUB.

Witnesses:

EDM. F. 'Bnowig R. T. CAMPBELL. 

